Mold structure with high-adaptability core pulling function

Abstract

A mold structure with a high-adaptability core pulling function comprises a movable mold and a fixed mold and further comprises an outer pulling block, a square guide hole is formed in the upper side of the outer pulling block, an inclined pushing block is arranged in the square guide hole, the movable mold is provided with a square guide column, the upper portion of the square guide column is a vertical section, the lower portion of the square guide column is an inclined section parallel to the inclined pushing block, and the square guide column is inserted into the square guide hole in a sliding mode so that when the movable mold can ascend and descend, the inclined pushing block can be inserted into the inclined section. The square guide column drives the outer pulling block to transversely slide; the inner pulling block is detachably connected to the outer pulling block in a sliding mode, the sliding directions of the inner pulling block and the outer pulling block are parallel, an inclined guide hole with the axis parallel to the inclined pushing block is formed in the upper side of the inner pulling block, the movable mold is provided with an inclined guide column with the axis parallel to the inclined guide hole, and the inclined guide column is inserted into the inclined guide hole in a sliding mode and drives the inner pulling block to transversely move when the movable mold ascends and descends. According to the scheme, the universality of the core pulling mechanism is effectively improved, and the mold cost is reduced.

Description

Technical Field

[0001] This invention relates to the technical field of injection molds, and more specifically to a mold structure with highly adaptable core-pulling mechanism. Background Technology

[0002] In recent years, with the improvement of living standards, users have increasingly pursued personalization and customization of their cars. As an important component affecting the appearance of a car, wheel trim not only needs to meet the overall aesthetic requirements of the vehicle, but also needs to achieve precise assembly with the wheel rim through a specific structure.

[0003] Wheel hub trim strips are mostly manufactured using injection molds. Typically, the trim strip is snapped onto the wheel hub via a recessed structure at its end. Since the recessed structure has a certain depth relative to the end face of the trim strip, the mold needs a corresponding core-pulling mechanism. The core-pulling mechanism includes an outer and an inner pull block. When the mold is closed, the outer pull block corresponds to the end face of the product within the cavity, and the inner pull block corresponds to the recessed structure on the end face of the product within the cavity. During demolding, the core-pulling mechanism needs to drive the inner and outer pull blocks away from the cavity, and the sliding stroke of the inner pull block needs to be greater than that of the outer pull block. This ensures that as the outer pull block detaches from the end face of the product, the inner pull block completely detaches from the recessed structure. The difference in sliding stroke between the inner and outer pull blocks corresponds to the depth of the recessed structure.

[0004] To accommodate different wheel sizes, the recessed structure of the trim strip varies in shape, groove depth, and groove width. Because wheel and trim strip designs are updated rapidly, changes to the recessed structure necessitate replacing the inner core puller. Furthermore, due to variations in groove depth, the sliding travel difference between the outer and inner core pullers also needs to be reset. This necessitates a complete redesign of the core-pulling mechanism, significantly increasing mold costs. Additionally, the existing outer and inner core pullers must be scrapped, resulting in persistently high overall production costs. Summary of the Invention

[0005] The purpose of this invention is to solve the problem in the prior art that when the recessed structure of the decorative strip changes, the inner pull block needs to be replaced. At the same time, because the groove depth of the recessed structure is different, the sliding stroke difference between the outer pull block and the inner pull block also needs to be reset. This leads to the need to redesign the entire core-pulling mechanism, resulting in high overall production costs.

[0006] To address the aforementioned problems, this invention provides a mold structure with high adaptability for core pulling, comprising a moving mold and a fixed mold arranged vertically, wherein a cavity is formed between the moving mold and the fixed mold, and further comprising: An external pull block, located on one side of the cavity and slidably connected to the fixed mold laterally to move closer to or further away from the cavity, has a square guide hole on its upper side. The square guide hole has a first hole wall away from the cavity and a second hole wall closer to the cavity. The upper part of the first hole wall is vertical, and the lower part slopes away from the cavity. A slanted push block is provided at the lower part of the first hole wall, and the protrusion distance of the slanted push block relative to the first hole wall is adjustable. The upper part of the second hole wall has a guide slope, and the lower part is vertical. The slanted push block and... The guide slopes are all inclined from top to bottom away from the cavity. The moving mold is provided with a square guide post that is inserted into the square guide hole. The upper part of the square guide post is a vertical section and the lower part is an inclined section parallel to the inclined push block. When the square guide post is fully inserted into the square guide hole, there is a gap between the inclined section and the inclined push block. The vertical section abuts against the upper part of the first hole wall and the lower part of the second hole wall. As the square guide post is driven to rise by the moving mold, the inclined section slides against the inclined push block and the guide slope to push the outer pull block away from the cavity. The inner pull block is detachably slidably connected to the outer pull block and parallel to the sliding direction of the outer pull block. The upper side of the inner pull block is provided with an inclined guide hole with an axis parallel to the inclined push block. The moving mold is provided with an inclined guide post with an axis parallel to the inclined guide hole. When the inclined guide post is slidably inserted into the inclined guide hole and the inclined guide post rises, the inclined guide post drives the inner pull block away from the cavity.

[0007] The above solution designs external and internal pull-out blocks. When the moving mold and the fixed mold are closed, the external pull-out block corresponds to the end face of the product inside the cavity, while the internal pull-out block corresponds to the recessed structure of the end face of the product inside the cavity. When the product inside the cavity needs to be demolded after molding, as the moving mold rises, the inclined guide pillar and the square guide pillar will move upward synchronously. The inclined guide pillar will slide relative to the inclined guide hole, so that the internal pull-out block moves laterally away from the cavity. Since there is a gap between the inclined section and the inclined push block, the square guide pillar will have a blank stroke. That is, the square guide pillar will not push the external pull-out block until the internal pull-out block is completely separated from the recessed structure of the product. At this time, the inclined section of the square guide pillar will abut against the inclined push block. Then, as the moving mold continues to rise, the square guide pillar will start to push the external pull-out block to move laterally away from the cavity, so that the external and internal pull-out blocks will be separated from the cavity synchronously, achieving complete demolding. Meanwhile, the above solution designs the inner and outer core-pulling blocks as detachable connections, and the inclined push block as having an adjustable protrusion distance relative to the first hole wall. Thus, when the recessed structure of the product changes, only the new inner core-pulling block needs to be replaced, and the protrusion distance of the inclined push block relative to the lower part of the first hole wall needs to be changed. This changes the distance between the inclined section of the square guide post and the inclined push block, thereby adjusting the sliding stroke difference between the outer core-pulling block and the inner core-pulling block. This avoids the need to replace the outer core-pulling block, effectively improving the versatility of the core-pulling mechanism and reducing mold costs.

[0008] In an improved embodiment, an adjusting screw is further included. The two sidewalls of the square guide hole located between the first hole wall and the second hole wall slide against the inclined push block. The side of the outer pull block facing away from the cavity is provided with an adjusting screw hole that extends to the first hole wall. The inclined push block is provided with a mounting hole. The adjusting screw is screwed into the adjusting screw hole, and the end of the adjusting screw is rotatably connected to the mounting hole. Thus, by rotating the adjusting screw, the protrusion distance of the inclined push block relative to the first hole wall can be changed, making the adjustment simple and convenient.

[0009] In an improved embodiment, the side wall of the outer pull block facing away from the cavity is a detachable split part, and the lower part of the first hole wall of the square guide hole is located on the side of the split part. The adjusting screw hole is opened in the split part, thereby facilitating the assembly and maintenance of the inclined push block by disassembling and assembling the split part.

[0010] In an improved embodiment, the outer pull block is provided with a sliding groove for sliding connection of the inner pull block, and the groove opening is upward. The upper part of the sliding groove is detachably connected with a fastener, and the fastener abuts against the upper side of the inner pull block to achieve a limiting position. Thus, the outer pull block achieves a sliding fit with the inner pull block through the sliding groove, which has good stability. Furthermore, the inner pull block is limited by the fastener, which facilitates the disassembly and assembly of the inner pull block.

[0011] In an improved embodiment, the fastener is a long strip with its long side parallel to the groove. There are two fasteners, which are detachably connected to the upper part of the two side walls of the groove by bolts, making disassembly and assembly simple and convenient.

[0012] In an improved embodiment, the two side walls of the chute near the cavity are formed with raised stepped surfaces, and the middle of the two side walls of the inner pull block is provided with a step. When the step abuts against the stepped surface, the sides of the outer pull block and the inner pull block facing the cavity are on the same plane, thereby achieving the positioning function of the outer pull block on the inner pull block through the cooperation of the step and the stepped surface.

[0013] In an improved embodiment, the bottom of the chute is provided with a rotatable first guide wheel with its axis perpendicular to the chute. The first guide wheel abuts against the lower side of the inner pull block, thereby making the inner pull block move more smoothly when it moves laterally within the chute.

[0014] In an improved embodiment, the fixed mold is provided with a rotatable second guide wheel whose axis is perpendicular to the slide groove. The second guide wheel abuts against the lower side of the outer pull block, thereby making the outer pull block slide more smoothly relative to the fixed mold laterally. Attached Figure Description

[0015] Figure 1 A schematic diagram of a mold structure with high adaptability for core pulling. Figure 1 (Includes product); Figure 2A schematic diagram of a mold structure with high adaptability for core pulling. Figure 2 ; Figure 3 This is a top view schematic diagram of a mold structure with high adaptability for core pulling; Figure 4 For along Figure 3 Cross-sectional view of section AA in the middle; Figure 5 For along Figure 3 Cross-sectional view of the BB section line; Figure 6 For along Figure 3 A cross-sectional view of the CC section line; Figure 7 A schematic diagram of an outer pulling block and a first guide wheel in a mold structure for core pulling with high adaptability; Figure 8 This is a schematic diagram of a fixed mold and a second guide wheel in a mold structure with high adaptability for core pulling.

[0016] Explanation of reference numerals in the attached figures. 1. Moving mold; 11. Square guide post; 12. Angled guide post; 2. Fixed mold; 3. Cavity; 4. External pull block; 40. External forming surface; 41. Square guide hole; 411. First hole wall; 412. Second hole wall; 412a. Guide slope; 42. Adjusting screw hole; 43. Slide groove; 44. Stepped surface; 45. Split part; 5. Internal pull block; 50. Internal forming surface; 50a. Boss; 51. Angled guide hole; 52. Step; 6. Angled push block; 61. Adjusting screw; 7. Fastener; 81. First guide wheel; 82. Second guide wheel. Detailed Implementation

[0017] It should be understood by those skilled in the art that the following embodiments are merely illustrative of the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0018] In the following description of the embodiments, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0019] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0020] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] Please see Figures 1-8 The present invention provides a mold structure with high adaptability for core pulling, comprising a moving mold 1 and a fixed mold 2 arranged vertically, wherein a cavity 3 is formed between the moving mold 1 and the fixed mold 2, and further comprising: An external pull block 4 is located on one side of the cavity 3 and is slidably connected to the fixed mold 2 to move closer to or further away from the cavity 3. A square guide hole 41 is provided on the upper side of the external pull block 4. The square guide hole 41 has a first hole wall 411 away from the cavity 3 and a second hole wall 412 close to the cavity 3. The upper part of the first hole wall 411 is vertical, and the lower part is inclined away from the cavity 3. A slanted push block 6 is provided at the lower part of the first hole wall 411, and the protrusion distance of the slanted push block 6 relative to the first hole wall 411 is adjustable. The upper part of the second hole wall 412 has a guide slope 412a, and the lower part is vertical. The slanted push block 6... Both the guide slope 412a and the guide slope 412a are inclined from top to bottom away from the cavity 3. The moving mold 1 is provided with a square guide post 11 that is inserted into the square guide hole 41. The upper part of the square guide post 11 is a vertical section and the lower part is an inclined section parallel to the inclined push block 6. When the square guide post 11 is fully inserted into the square guide hole 41, there is a gap between the inclined section and the inclined push block 6. The vertical section abuts against the upper part of the first hole wall 411 and the lower part of the second hole wall 412. As the square guide post 11 is driven to rise by the moving mold 1, the inclined section slides against the inclined push block 6 and the guide slope 412a to push the outer pull block 4 away from the cavity 3. The inner pull block 5 is detachably slidably connected to the outer pull block 4 and parallel to the sliding direction of the outer pull block 4. The upper side of the inner pull block 5 is provided with an inclined guide hole 51 with an axis parallel to the inclined push block 6. The moving mold 1 is provided with an inclined guide post 12 with an axis parallel to the inclined guide hole 51. When the inclined guide post 12 is slidably inserted into the inclined guide hole 51 and the inclined guide post 12 rises, the inclined guide post 12 drives the inner pull block 5 away from the cavity 3.

[0022] The above scheme designs an outer draw block 4 and an inner draw block 5. When the moving mold 1 and the fixed mold 2 are closed, the outer draw block 4 corresponds to the end face of the product inside the cavity 3, while the inner draw block 5 corresponds to the recessed structure of the end face of the product inside the cavity 3. When the product inside the cavity 3 needs to be demolded after molding, as the moving mold 1 rises, the inclined guide post 12 and the square guide post 11 will move upward synchronously. Among them, the inclined guide post 12 will slide relative to the inclined guide hole 51, so that the inner draw block 5 moves laterally away from the cavity 3. As the moving mold 1 continues to rise, the square guide post 11 will have a blank stroke due to the gap between the inclined section and the inclined push block 6. That is, the square guide post 11 will not push the outer pull block 4 until the inner pull block 5 is completely separated from the recessed structure of the product. At this time, the inclined section of the square guide post 11 will abut against the inclined push block 6. Then, as the moving mold 1 continues to rise, the square guide post 11 will start to push the outer pull block 4 to move laterally away from the cavity 3, so that the outer pull block 4 and the inner pull block 5 will be separated from the cavity 3 at the same time, and complete demolding will be achieved. Meanwhile, the above solution designs the inner pulling block 5 and the outer pulling block 4 as detachable connections, and the inclined push block 6 as having an adjustable protrusion distance relative to the first hole wall 411. Thus, when the recessed structure of the product changes, only the new inner pulling block 5 needs to be replaced, and the protrusion distance of the lower part of the inclined push block 6 relative to the first hole wall 411 needs to be changed. This changes the distance between the inclined section of the square guide post 11 and the inclined push block 6, thereby adjusting the sliding stroke difference of the outer pulling block 4 relative to the inner pulling block 5. This avoids the need to replace the outer pulling block 4, effectively improves the versatility of the core pulling mechanism, and reduces mold costs.

[0023] The fixed mold 2 and the movable mold 1, located above the fixed mold 2 and capable of being raised and lowered, are common knowledge and will not be elaborated upon here. The cavity 3 is formed by the fixed mold 2 and the movable mold 1. For ease of understanding, see attached... Figure 1 and 2 The main bodies of the moving mold 1 and the fixed mold 2 are hidden, with only the connection parts between the moving mold 1 and the fixed mold 2 relative to the outer pulling block 4 and the inner pulling block 5 retained, and attached... Figure 1 The cavity 3 in the design corresponds to the product position. The outer pull block 4 is located on one side of the cavity 3 and has an outer forming surface 40 facing the cavity 3; the inner pull block 5 is also located on one side of the cavity 3 and has an inner forming surface 50 facing the cavity 3, and the inner forming surface 50 has a boss 50a corresponding to the recessed structure of the product. In addition, the square guide hole 41 and square guide post 11 referred to in this embodiment refer to those whose cross-section is square / rectangular.

[0024] Combination Figure 5As shown, regarding the adjustment method of the protrusion distance of the inclined push block 6 relative to the first hole wall 411, this embodiment also includes an adjusting screw 61. The two side walls of the square guide hole 41 located between the first hole wall 411 and the second hole wall 412 slide against the inclined push block 6. The side of the outer pull block 4 facing away from the cavity 3 is provided with an adjusting screw hole 42 that extends to the first hole wall 411. The inclined push block 6 is provided with a mounting hole. The adjusting screw 61 is screwed into the adjusting screw hole 42, and the end of the adjusting screw 61 is rotatably connected to the mounting hole. Thus, by rotating the adjusting screw 61, the protrusion distance of the inclined push block 6 relative to the first hole wall 411 can be changed, making the adjustment simple and convenient.

[0025] In addition, in order to realize the assembly of the inclined push block 6, the side wall of the outer pull block 4 facing away from the cavity 3 is a detachable split part 45. The split part 45 is detachably connected to other positions of the outer pull block 4 by bolts. The lower part of the first hole wall 411 of the square guide hole 41 is located on the side of the split part 45, and the adjusting screw hole 42 is opened through the split part 45. Thus, by disassembling and assembling the split part 45, it is convenient to assemble and maintain the inclined push block 6.

[0026] Alternatively, the protrusion distance of the inclined push block 6 relative to the first hole wall 411 can be adjusted in other ways. For example, in other embodiments, a number of pads are provided between the first hole wall 411 and the inclined push block 6, which are interlocked one by one. By removing the split part and changing the number of pads between the first hole wall 411 and the inclined push block 6, the protrusion distance of the inclined push block 6 relative to the first hole wall 411 can be changed.

[0027] Combination Figure 3 and 6 As shown, in this embodiment, the outer pull block 4 is provided with a sliding groove 43 for sliding connection of the inner pull block 5, and the groove 43 is opened upward. The direction of the sliding groove 43 is parallel to the sliding direction of the outer pull block 4. The upper part of the sliding groove 43 is detachably connected with a fastener 7, and the fastener 7 abuts against the upper side of the inner pull block 5 to achieve a limiting position. Thus, the outer pull block 4 achieves a sliding fit with the inner pull block 5 through the sliding groove 43, which has good stability. The fastener 7 further limits the inner pull block 5, making it easy to disassemble and assemble the inner pull block 5.

[0028] More specifically, the fastener 7 is a long strip with its long side parallel to the slide groove 43. There are two fasteners 7, which are detachably connected to the upper part of the two side walls of the slide groove 43 by bolts, making disassembly and assembly simple and convenient.

[0029] As a further improvement to external block extraction 4, combined with Figure 3 and Figure 7As shown, the two groove walls of the slide 43 have raised stepped surfaces 44 on the side near the cavity 3, so that the groove width of the end of the slide 43 near the cavity 3 is smaller than the groove width of the end away from the cavity 3; the inner draw block 5 has a step 52 in the middle of the two side walls, and when the step 52 abuts against the stepped surface 44, the outer forming surface 40 of the outer draw block 4 and the inner forming surface 50 of the inner draw block 5 are on the same plane, so that the positioning function of the outer draw block 4 on the inner draw block 5 is realized by the cooperation of the step 52 and the stepped surface 44.

[0030] In addition, such as Figure 7 As shown, a rotatable first guide wheel 81 with its axis perpendicular to the bottom of the slide groove 43 can be provided. The first guide wheel 81 abuts against the lower side of the inner draw block 5, thereby making the inner draw block 5 move more smoothly when it moves laterally in the slide groove 43.

[0031] Furthermore, such as Figure 8 As shown, the outer pull block 4 is slidably connected to the fixed mold 2. The fixed mold 2 is provided with a rotatable second guide wheel 82 whose axis is perpendicular to the slide groove 43. The second guide wheel 82 abuts against the lower side of the outer pull block 4, thereby making the outer pull block 4 slide more smoothly relative to the fixed mold 2 laterally.

[0032] It should be noted that in the description of this application, the terms "inner" and "outer," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application. All directional indications (such as up, down, left, right, front, back, inner, and outer) are only used to explain the relative positional relationships and movement between components in a specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0033] In the description of this application, the references to terms such as "an embodiment," "some embodiments," "in this embodiment," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0034] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A mold structure with high adaptability for core pulling, comprising a moving mold and a fixed mold arranged vertically, wherein a cavity is formed between the moving mold and the fixed mold, characterized in that, Also includes: An external pull block, located on one side of the cavity and slidably connected to the fixed mold laterally to move closer to or further away from the cavity, has a square guide hole on its upper side. The square guide hole has a first hole wall away from the cavity and a second hole wall closer to the cavity. The upper part of the first hole wall is vertical, and the lower part slopes away from the cavity. A slanted push block is provided at the lower part of the first hole wall, and the protrusion distance of the slanted push block relative to the first hole wall is adjustable. The upper part of the second hole wall has a guide slope, and the lower part is vertical. The slanted push block and... The guide slopes are all inclined from top to bottom away from the cavity. The moving mold is provided with a square guide post that is inserted into the square guide hole. The upper part of the square guide post is a vertical section and the lower part is an inclined section parallel to the inclined push block. When the square guide post is fully inserted into the square guide hole, there is a gap between the inclined section and the inclined push block. The vertical section abuts against the upper part of the first hole wall and the lower part of the second hole wall. As the square guide post is driven to rise by the moving mold, the inclined section slides against the inclined push block and the guide slope to push the outer pull block away from the cavity. The inner pull block is detachably slidably connected to the outer pull block and parallel to the sliding direction of the outer pull block. The upper side of the inner pull block is provided with an inclined guide hole with an axis parallel to the inclined push block. The moving mold is provided with an inclined guide post with an axis parallel to the inclined guide hole. When the inclined guide post is slidably inserted into the inclined guide hole and the inclined guide post rises, the inclined guide post drives the inner pull block away from the cavity.

2. The mold structure with high adaptability for core pulling according to claim 1, characterized in that, It also includes an adjusting screw, the two side walls of the square guide hole located between the first hole wall and the second hole wall are slidably abutting against the inclined push block, the side of the outer pull block facing away from the cavity is provided with an adjusting screw hole that extends to the first hole wall, the inclined push block is provided with a mounting hole, the adjusting screw is screwed into the adjusting screw hole, and the end of the adjusting screw is rotatably connected to the mounting hole.

3. The mold structure with high adaptability for core pulling according to claim 2, characterized in that, The side wall of the outer pull block facing away from the cavity is a detachable split part, and the lower part of the first hole wall of the square guide hole is located on the side of the split part, and the adjusting screw hole is opened in the split part.

4. The mold structure with high adaptability for core pulling according to claim 1, characterized in that, The outer pull block is provided with a sliding groove for sliding connection of the inner pull block, and the groove opening is upward. The upper part of the sliding groove is detachably connected with a fastener, and the fastener abuts against the upper side of the inner pull block to achieve a limiting position.

5. The mold structure with high adaptability for core pulling according to claim 4, characterized in that, The fastener is long and its long side is parallel to the groove. There are two fasteners, which are detachably connected to the upper part of the two side walls of the groove by bolts.

6. The mold structure with high adaptability for core pulling according to claim 4, characterized in that, The two side walls of the chute have raised stepped surfaces near the cavity. The inner pull block has a stepped platform in the middle of its two side walls. When the stepped platform abuts against the stepped surface, the outer pull block and the inner pull block are on the same plane facing the cavity.

7. The mold structure with high adaptability for core pulling according to claim 4, characterized in that, The bottom of the chute is provided with a rotatable first guide wheel whose axis is perpendicular to the chute, and the first guide wheel abuts against the lower side of the inner pull block.

8. The mold structure with high adaptability for core pulling according to claim 1 or 7, characterized in that, The fixed mold is provided with a rotatable second guide wheel whose axis is perpendicular to the slide groove, and the second guide wheel abuts against the lower side of the outer pull block.

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